My Fritz logfile is around 20 MB and that's the smallest of 4 (another one is 95 MB
I renamed the 20 MB log and startup went from 12 to 11 seconds. That second that was gained must be caused by caching, cause the 3rd time it was 10 seconds. So it's not the log file size. 10 or 20 MB is "nothing".
During startup the Plugin also does some things like model detection, etc.
For that it has to login on the Fritzbox, which is not a 'fast' process - the fritz web ui will never win a speed contest
Maybe I can speed it up by doing that in a background worker process.
Startup time is important for me too, since I'm doing nothing but restarting HS all the time, so every second counts...